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  • Just When I Thought I’ve Seen Everything
    Monday, April 2, 2018 2:18 PM
    OK, let me see if I’ve got this right. The Mercedes 7G-DCT 7-speed dual clutch transmission (Figure 1) does not have a reverse idler gear. When shifted to reverse it uses 2nd gear, 3rd gear and 1st along with all four shafts. That’s correct, now let me explain how and why. This compact dual-clutch transmission was designed in 2012 to replace the 722.8 CVT transmission found in the later B Class 246 models...
  • Extra Set of Eyes Saves the Day
    Friday, March 2, 2018 1:43 PM
    In addition to the OEM-spec remanufactured transmissions we build, we also offer a series of heavy-duty transmissions available in three different stages. This article examines the installation of our Road Ripper™ 3000 (stage 3 unit) in a 2005 Dodge 2500 pickup equipped with a 5.9L diesel and a 618/48RE transmission.
  • Up To Standards: Learn New Things.
    Thursday, January 4, 2018 2:54 PM
    You are not supposed to get to the finish line in pristine condition. You are supposed to cross the line a burnt out, beat up hulk, and through the smoke and leakage, yell, “WHAT A RIDE!”
  • Thursday, January 4, 2018 2:48 PM
    There are times on ATSG’s technical help line, when we discover a solution to a problem, we would like to produce a bulletin or a seminar piece to share this information but do not. The reason for this is, although we determined a solution, we can only guess as to why the solution corrects the problem. Here is an example of the type of situation we find ourselves in.
  • TASC Force Tips: Valve Body - Vacuum test locations
    Thursday, January 4, 2018 2:40 PM
  • ‘Rebuilt’ salvage-yard transmission, hmmm …
    Wednesday, January 3, 2018 3:45 PM
    We had a local general repair shop bring us a 2014 Jeep Grand Cherokee 3.6L V-6 engine equipped with a ZF 8-speed (845RE) transmission; they had just installed a “rebuilt” transmission that was sourced from a salvage yard. The customer’s stated concern was, “The place that built the transmission just said it needed to be programmed.” Needless to say, we knew that this was going to be an adventure.
  • Technically Speaking: It Doesn’t Move and I Cannot See Why
    Friday, December 1, 2017 12:01 AM
    A Nissan or Infiniti vehicle using the RE5R05A transmission may come into the shop with a no-move complaint. Or, a unit still under your warranty comes back with a no-move condition. And worse yet, you take it apart and see nothing wrong.
  • MP3023 T-Case: Simple Mechanics, Complex Electronics
    Friday, December 1, 2017 12:01 AM
    The MP3023 is an active automatic transfer case that is found in a wide variety of vehicles. This unit will be found in GM trucks 2007-13, Jeep Grand Cherokees 2011-19, and in Dodge Durangos 2010-up. We will be discussing the Jeep version here, which has very sophisticated control electronics.
  • TASC Force Tips: ‘Yaw’ Making Us Chase Our Tails
    Friday, December 1, 2017 12:01 AM
    A few years ago, I wrote an article about thinking outside the box. Of course, in this case, the “box” is the transmission, and “outside” is ANYTHING else on the vehicle that could affect how the transmission operates (or is perceived to operate). With so many computers sharing data and the OEMs giving us little information as to how the software responds to certain problems, it can easily back us into a corner of confusion. It seems about once a year our shop gets burned chasing our tail over something that should be fairly easy to correct. Here is our latest “tail-chaser.”
  • R & R Tech: Overdrive Solenoid Déjà vu All Over Again
    Friday, December 1, 2017 12:01 AM
    About a month ago a customer came into our shop with a 2008 Chrysler Town & Country equipped with a 4.0 liter V6 engine and a 62TE transmission. He was complaining that it had a whining noise, and sometimes it would not shift and seemed to stay in the same gear. When the vehicle was hooked to the scan tool it had a code for the overdrive solenoid control circuit (P0760). The fluid was at the correct level and smelled like normal fluid; however, it was dark purple indicating possible metal contamination.
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Beyond the missions of providing education and reference materials, Transmission Digest serves as a prime resource used as shops find the parts, supplies and services necessary for successful and profitable operation. Nine of the 12 issues published each year are focused on the products, services and suppliers relating to a specific profit center within the retail shop.

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